Ugh!
I hate any creature made out of jelly.
There is something to be said for a skeleton, and that is, 'they are very useful'.
I recently created a slogan for the campaign to exterminate all jelly creatures.
'No-Bone(s)? Go Home!'.
I think it is a rather good slogan!
Anyway, the most disgusting jelly-based creature is obviously all kinds of jellyfish.
They make me want to vomit just thinking about them.